/Engine/Source/Runtime/GeometryCore/Public/CompGeom/Delaunay2.h
Compute an (optionally constrained) Delaunay triangulation. Note this clears any previously-held triangulation data, and triangulates the passed-in vertices (and optional edges) from scratch
false if triangulation failed
bool Triangulate ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [TVector2](API\Runtime\Core\Math\TVector2)< double >> Vertices, [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FIndex2i](API\Runtime\GeometryCore\FIndex2i) > Edges )